Here you can find the source of negativePart(final double[] data)
final public static double[] negativePart(final double[] data)
//package com.java2s; /*/*from w w w .java2 s . c om*/ * ==================================================== * Copyright (C) 2013 by Idylwood Technologies, LLC. All rights reserved. * * Developed at Idylwood Technologies, LLC. * Permission to use, copy, modify, and distribute this * software is freely granted, provided that this notice * is preserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * The License should have been distributed to you with the source tree. * If not, it can be found at * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * Author: Charles Cooper * Date: 2013 * ==================================================== */ public class Main { final public static double[] negativePart(final double[] data) { final double[] ret = new double[data.length]; for (int i = data.length; 0 != i--;) ret[i] = min(data[i], -0.0); return ret; } public final static double min(double... values) { if (values.length == 0) return Double.NaN; double ret = values[0]; for (int i = 1; i < values.length; i++) if (values[i] < ret) ret = values[i]; return ret; } }